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Old 04-03-2006, 11:43 AM   #1
cornuts
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Default Re: Seeking 4.10 Gear Installation Advice!!!

i called the local ford dealer and they dont make a 23 tooth spedo gear they told me to go to dodge to get the gear. i also talked to a tranny shop and he said that each tooth is 2mph and iam off 14 mph so a 23 tooth wont be enough my car has a 21 tooth please help
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Old 04-03-2006, 09:24 PM   #2
Hammer
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Default Re: Seeking 4.10 Gear Installation Advice!!!

Did you not look in the chart I attached?

What size tires are you running on the car?
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Old 04-03-2006, 09:44 PM   #3
Hammer
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Default Re: Seeking 4.10 Gear Installation Advice!!!

Steeda sells a 23 tooth gear.
http://www.steeda.ca/catalogue_product_1238.asp
Unfortunately, it will still be off with 4.10s.....
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Old 04-06-2006, 12:09 AM   #4
mark sweetser
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Default Re: Seeking 4.10 Gear Installation Advice!!!

hammer, i did the calculation per the link you attached. i've got a 8 tooth, 3.73 ratio, and whether i have 800 or 815 (don't know exact) tire revolutions formula says i need a 24 tooth gear. do they make such a thing. i've got 275/40-17's on 17x9" rims on a t-45 equipped 96 gt which had a 3.27 stock, not 3.08's like other GT's of that year (it's a GTS). speedo feels about 8-10 mph off. what do you suggest?
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Old 04-06-2006, 12:37 AM   #5
Hammer
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Default Re: Seeking 4.10 Gear Installation Advice!!!

Two options:
1. Get the 23 tooth gear and get pretty close (That's what I used with my 98 and 3.73s)

or

2. Call Dallas Mustang and ask if they make a speed-cal for your application:
http://www.dallasmustang.com/page/pr...p?product=9910
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Old 04-06-2006, 04:19 PM   #6
surfbeast
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Default Re: Seeking 4.10 Gear Installation Advice!!!

Like the HAMMER said. get the Steeda 23 tooth or I think you can get a speed cal. I have the 23 tooth and it's off, but I never look at the speedo anyway!!
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